Apparatus for separating liquids of different



Aug. 26, 1930. 'w. LINNMANN; JR Re. 17,776

- APPARATUS FOR SEPARATING LIQUIDS OF DIFFERENT SPECIFIC GRAVI'I'IIS Original Filed Nov. 22, 1926 2 Sheets-Sheet 1 ATTORNEY I w. LINNMANN, JR

Aug 26, 1930. Re. 17,776

APPARATUS FOR 'SE-PARA'I'ING LIQUIDS OF DIFFERENT SPECIFIC GRAvI'rIss Original Filed Nov. 22, 1926 2 Sheets-Sheet 2 V mvzuron Arm/Mn Reissued Aug. 26, 1930 o. 1=r1cs WILHELM LINNMANN, (TIL, OF ESSEN-ALTENESSEN, -GERM-ANY .API'A'RATU's For; SEPARA'IIING L-I'Q'I'I'IDS' or messa es ermine GRAV-LETIES origmsu no. 1,671,115, dated May29, 1925, Serial 1101149351, filed'Novemher 22, 1926, and 'in Germany January 28, 1926. Application for reissue filed May 29, 1930. Serial No. 457,432.

My invention relates to improvements in apparatus for separating liquids of different specific gravities, and more particularly in apparatus for separating light liquids from waste-water, in which the outlet is adapted to be automatically closed by means of a float valve as soon as a certain amount of liquidof low specific gravity such as benzol has'been collected on the surface of the liq 'u'id of higher specific gravity such as wastewater. Thereby the attendant is forced to tap off-the light liquid in good time and before the said light liquid is discharged through the 'outlet. The object of the im- 1 provements is to provide an'apparatus of this class which is simple inconstruction and reliable in operation, and with this object in view my invention censi'sts' in providing a tank having an inlet and an outlet, the said v 7 through the ,pipe 2', and it rises Within the'gi'm 0 outlet being directed upwardly within the tank and adapted to be closed by a valve disk Connected with afloating hood surrounding the inlet end of the outlet. Thus while the layer of benzol collected on the surta'ce'ofthe water is thin, the valve disk is 'held'a certain distance away from the inlet end of the outlet pipe, and when a thick layer of benzol has 'cdllectedon the top ofthe water the floating hood sinks into thesaid benzolby reason of the reduced specificgravity' of the -medium in which it is immersed, untilfiiially the valve disk is seated on the inlet end of theoutlet and the delivery of waste-water is prevented. Other objects of the improvements will be understood from the following description.

For the purpose of explaining the'invention several examples embodying the same have been shown in the accompanying dr'awings,1n"whic h the same letters of reference 40 have been used'in all the views to indicate corresponding parts; In said drawings,

Fig. 1 is a sectional elevation showing the apparatus, V V

Fig. 2 is apartial sectional elevation showing a modification, and

Fig. 3 is a partial sectional elevation show ing another modification.

In the example shown in Fig. 1 my improved separating apparatus comprises a tank a divided by a verticalpartition 0 having Zface ever, that no benzo'l the liquidis supplied to the tubular member m inclusively from the beginning of the liquid will not rise in itsupper part an opening g'into two cham here '1) and h communicating with each other at the bottomof'the tank and through the openiiig'g. The chamber h is provided with an inlet pipe i, and the'chamber b with an, outlet pipe j, the outlet pipej having an inner portion c l'di'r'e'c'ted upwardly. The portion dot the outlet pipe is surrounded by a tubular member m which is open at its top and bottom, and which is surrounded by a pipe-B0 e constructedat its-bottom endin the form of an annular float is. To a bar a fixedto or made integral withthe pipe 6 a valve disk 7 18 secured Wl'llCll is inpositionfor closing the inlet end of thepipe section d. The top-;..65

part ofthe pipe eeXtends into-a fiXed' hood t. In the operation of the apparatus the waste-water having b'enzol admixed thereto is delivered intothe chamber hot the tank in thechamber h,-a1id there is only'was'te- 'fi water and no'benzol within the chamber 6.

After a while thewater within the chamber 6 closes-the tubular member m at itsbottom and thereafter the level of the liquid :rises to a point-'above'the bottom end of the open- 30 ing g. Now'the benzol collected on-the surof the water flows into the chamber- 7).

By the further rising of the water the float is will float within the said liquid "and raise the valve disk f from its seat on thepipe (L whereupon the waste-water is discharged throughthepipe cl, 'It will benoted howis discharged, because the bottom thereof. At -.90 the operation the level of above the inlet end of the pipe d. But when the'layer of benzol collected on the surface of the water is increased, the level of the ben7ol within the-195 part of the chamber 6 outside the tubular member m will rise, while the level of the water withinthe tubular member on will not -rise above the inlet endof the pipe (Z, by

reason. of the different specific gravities of disk f and force the same downwardly and on its seat.

N ow the benzol is tapped off, whereupon water from the tubularinember m flows into the outer part of the chamber Z), so far that the float Zahas again'the tendency to raise the disk f fromitsseat. By tapping off the benzol, communication between the inner 'partofthe pipe 6 with the outer air is again established, and further. the air will gradually fiowrbetween the valve f and the pipe d, so that the float 7:: can readily raise the valve disk from its seat, whereupon the discharge of the waste-water through the pipe d is continued.

It will be understood from-the foregoing that the tubular member 771,, is essential only when the floatk maybe removed in order b to preventthe benzol from entering the outlet tube In case however,-it should be desired or amunicipal ordinance should require thatithe closure or hood 6 be sealed in rounded by a hood t part of pipe e connected with place, thetubular member m then becomes unnecessary and can be omitted tubular part 6 of the float at all times operates to prevent any flow of the benzol into the outlet tube d. t i

In Fig 2. I have shown a modification in whichthe top plate of the hood 6 'isdepressed' downwardly and into the .top part of the pipe e5 Thereby the function o-fthe hood preventing the flow of benzol above thetop the pipe 6 is further improved. Otherwise the construction of the apparatus is'th e same as thatdescribed with to Fig. 1, and the same letters of reference have been used to indicate corresponding parts.

In the modification, shownin Fig; 3 the the float is ends at its reduced diameter surof comparatively small the valvedisk f is conby means of a tubular top into a portion w of diameter. Further,

lngs m throughxwhich, the waste-water has access to the part above the valve'disk 79 and the connection of the inner part of the tubular member m with the outer air is established after tapping offthe benzol, ashas been described with reference'to Fig. 1. 7

While in describing the invention reference=hasbeen made to particular examples] embodying the same Iwi'shitto be understood that I do: not limit myself to the conthe float is, which is now immersed since the reference .nected with 'wardly therefrom'i'nto the'tank, an annular float surrounding said pipe and extending,

structions shown in the drawings and that various changes may be made in the general arrangement of the apparatus and the construction of its parts without departing from the invention.

I claim:

11 An apparatus for separating liquids of different specific gravities, comprising a tank having an inlet and an outlet, a tubular memberwithin said'tank open at its top and bottom, a pipe connected with said outlet and extending upwardly therefrom and. into sald tubular member, an annular float surrounding said tubular member and extending upwardly therefrom, a valve disk carriedby said float and adapted to closesaid pipe, and

a fixed hoodisurrounding the top part of said float.

2. Anapparatus for separating liquids of different specific gravities, comprising a tank having an inlet and an outlet in the form of surrounding the top partof said float.

3. An apparatus for separating liquids of different specific gravities, comprising a tank having an inlet and an outlet, a tubularmember within said tank open at its top and bottom, a pipe connected with said outlet and extending upwardly therefrom and into said tubular member, an annularfloat surround- 1I1gSL1d tubularmember and extending up-,

j wardly therefrom and. reduced in diameter at its top, a valve diskfixed to a tubular part depending from the top part of said float and into said tubular member and into position for closingsaid pipe, and a fixed hood sur-, rounding thereduced. top part of said float.

4. An apparatus for separating liquids of different specific gravities, comprising a tank having an inlet and an outlet, a tubular member within said tank open at its top and bottom, a pipe connected with said outlet and extending upwardly therefrom and into said tubular member, an annular float surrounding said tubular member wardly therefrom, said float andadapted to close said pipe, and

and extending upa fixed hood surrounding the top part of said float, the top wall of said hood being. directed downwardly and into said float.

5. An apparatus for separating liquids of;

.jdifi'erent specific gravities,comprising a tank having aninlet and an outlet, a plpe consaid outlet and extending upa valve disk, carried by WILHELM LINNMANN, J13. 

